Arno M. M. Muijtjens

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Velocity profiles were determined in rabbit mesenteric arterioles (diameter 17-32 micron). A good spatial resolution was obtained by using the blood platelets as small and natural markers of flow, providing for the first time in vivo detailed, quantitative information about the shape of the velocity profiles in microvessels. In some experiments red blood(More)
A prospective longitudinal and standardized study is presented, dealing with ultrasonographic and hormonal characteristics of the luteinized unruptured follicle (LUF) syndrome. Among 600 cycles monitored in 270 infertility patients, 40 cycles in 27 patients showed no evidence of follicle rupture, in spite of signs of luteinization, as reflected by basal(More)
PURPOSE Clinical teaching's importance in the medical curriculum has led to increased interest in its evaluation. Instruments for evaluating clinical teaching must be theory based, reliable, and valid. The Maastricht Clinical Teaching Questionnaire (MCTQ), based on the theoretical constructs of cognitive apprenticeship, elicits evaluations of individual(More)
A model of left ventricular (LV) kinematics is essential to identify the fundamental physiological modes of LV deformation during a complete cardiac cycle as observed from the motion of a finite number of markers embedded in the LV wall. Kinematics can be described by a number of modes of motion and deformation in succession. An obvious mode of LV(More)
1. Sachse C, Dressler F, Henkel E. Increased serum procalcitonin in newborn infants without infection. Clin Chem 1998;44:1343–4. 2. Monneret G, Labaune J, Isaac C, Bienvenu F, Putet G, Bienvenu J. Procalcitonin and C-reactive protein levels in neonatal infections. Acta Paediatr 1997;86:209–12. 3. Chiesa C, Panero A, Rossi N, Stegagno M, De Giusti M, Osborn(More)
CONTEXT In-training assessment (ITA), defined as multiple assessments of performance in the setting of day-to-day practice, is an invaluable tool in assessment programmes which aim to assess professional competence in a comprehensive and valid way. Research on clinical performance ratings, however, consistently shows weaknesses concerning accuracy,(More)
During the ejection phase, motion of the left ventricular (LV) wall is such that all myocardial fibers shorten to the same extent. In a mathematical model of LV mechanisms it was found that this condition could be satisfied only if torsion around the long axis followed a unique function of the ratio of cavity volume to wall volume. When fiber shortening(More)
CONTEXT For more than two decades the Medical School in Maastricht, the Netherlands, has used simulated patients (SPs) to provide students with opportunities to practise their skills in communication and physical examination. In this educational setting a student meets a SP in a videotaped session. Feedback by the SP to the student at the end of the session(More)
OBJECTIVE To assess the quality of telephone triage by following the consecutive phases of its care process and the quality of the clinical questions asked about the patient's clinical condition, of the triage outcome, of the content of the home management advice, and of the safety net advice given at out of hours centres. DESIGN Cross sectional national(More)
The portfolio is becoming increasingly accepted as a valuable tool for learning and assessment. The validity of portfolio assessment, however, may suffer from bias due to irrelevant qualities, such as lay-out and writing style. We examined the possible effects of such qualities in a portfolio programme aimed at stimulating Year 1 medical students to reflect(More)